What does OBD2 code P0306 mean?
The engine control module (ECM) or powertrain control module (PCM) sets code P0306 when it registers that the Cylinder 6 Misfire Detected performance has fallen below the manufacturer's required baseline. This triggers your vehicle's malfunction indicator lamp (MIL), commonly known as the Check Engine Light.
Is It Safe to Drive with Code P0306?
No. Park immediately.
Symptoms of OBD2 Code P0306
Depending on your car model, symptoms for P0306 may vary. The most typical symptoms include:
- Heavy engine vibration
- Exhaust sputtering
- Flashing MIL
What Causes Code P0306?
A variety of physical faults can trigger the P0306 code. Here are the most frequent culprits:
- Failing spark plug or coil pack on Cylinder 6
- Fuel injector circuit problem
- Mechanical valve failure
Step-by-Step Diagnostic Routine
Before replacing any expensive components, run through these standardized troubleshooting steps:
- Identify the misfire on Cylinder 6 using OBDAssistant.
- Inspect coil wiring harness for Cylinder 6.
Expected Repair Costs for P0306
$60 - $250.
Save on Diagnosis with OBDAssistant
Quickly distinguishes Cylinder 6 misfire from random P0300 codes.
Frequently Asked Questions
It means the cylinder number 6 is failing to complete proper fuel combustion.